145285788171 has 4 divisors (see below), whose sum is σ = 193714384232. Its totient is φ = 96857192112.

The previous prime is 145285788157. The next prime is 145285788173. The reversal of 145285788171 is 171887582541.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 145285788171 - 2¹³ = 145285779979 is a prime.

It is a super-2 number, since 2×145285788171² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145285788173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24214298026 + ... + 24214298031.

It is an arithmetic number, because the mean of its divisors is an integer number (48428596058).

Almost surely, 2^145285788171 is an apocalyptic number.

145285788171 is a deficient number, since it is larger than the sum of its proper divisors (48428596061).

145285788171 is an equidigital number, since it uses as much as digits as its factorization.

145285788171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48428596060.

The product of its digits is 5017600, while the sum is 57.

The spelling of 145285788171 in words is "one hundred forty-five billion, two hundred eighty-five million, seven hundred eighty-eight thousand, one hundred seventy-one".